Question

На детской площядке 9 велосипедов из ни несколько 2-х калесных и четырех калесных всего 21 калесо сколько 2-х калесных и 4-х калесных

Answer 1

21:4=5,1
Значит 4х колесных 4
А 2х колесных 5

Answer 2

Calculating the Number of Two-Wheeled and Four-Wheeled Bicycles

To solve this problem, we can use a system of equations to represent the given information. Let's denote the number of two-wheeled bicycles as x and the number of four-wheeled bicycles as y. We are given the following information:

1. There are 9 bicycles in total. 2. The total number of wheels is 21.

We can express this information in the following equations:

1. x + y = 9 (Equation 1, representing the total number of bicycles) 2. 2x + 4y = 21 (Equation 2, representing the total number of wheels)

Solving the System of Equations

We can solve this system of equations to find the values of x and y.

First, let's solve Equation 1 for x: x = 9 - y (Equation 3)

Now, substitute the value of x from Equation 3 into Equation 2: 2(9 - y) + 4y = 21 18 - 2y + 4y = 21 18 + 2y = 21 2y = 21 - 18 2y = 3 y = 3/2 y = 1.5

Now, substitute the value of y back into Equation 3 to find x: x = 9 - 1.5 x = 7.5

Conclusion

According to the given information, it is not possible to have a fraction of a bicycle. Therefore, the solution to the system of equations does not yield whole number values for x and y. This suggests that there may be a mistake in the given information or the problem formulation.